by steps
000000 000000
000000
7f7f7f 7f7f7f
7f7f7f
00007f 00007f
00007f
0000ff 0000ff
0000ff
007f00 007f00
007f00
007f7f 007f7f
007f7f
728a80 728a80
728a80
007fff 007fff
007fff
00ff00 00ff00
00ff00
00ff7f 00ff7f
00ff7f
669682 669682
669682
00ffff 00ffff
00ffff
7f0000 7f0000
7f0000
7f007f 7f007f
7f007f
5aa183 5aa183
5aa183
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7f7f00 7f7f00
7f7f00
4ead85 4ead85
4ead85
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7f7fff
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7fff7f 7fff7f
7fff7f
7fffff 7fffff
7fffff
42b987 42b987
42b987
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36c488 36c488
36c488
ff7f00 ff7f00
ff7f00
ff7f7f ff7f7f
ff7f7f
ff7fff ff7fff
ff7fff
2ad08a 2ad08a
2ad08a
ffff00 ffff00
ffff00
ffff7f ffff7f
ffff7f
ffffff ffffff
ffffff
1edc8c 1edc8c
1edc8c